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A Spiral Galaxy

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14y ago

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What is the name for the group of billions and billions of stars that form the basic unit of the universe?

That is a galaxy. The one we live in is called the Milky Way. There are millions of other galaxies in the universe, many of which have a spiral structure (and probably a black hole in the middle).


What are a group of stars that form an image?

The group is known as a constellation.


What forms in the great clouds of gas and dust in the spiral arms of a galaxy?

Stars form in the great clouds of gas and dust in the spiral arms of a galaxy.


Describe all the categories of galaxies?

the three main types of galaxies are spiral, elliptical and irregular spiral contains spiral arms contained gas, dust and they help new stars form


Why do new stars form in the arms of a spiral galaxy and not in the central bulge?

Stars form in all parts of our galaxy - not just the "arms". Stars do indeed form in the central bulge. The vast majority of hot, young, blue stars are formed in the arms, but stars also form in the central bulge as well.


Why do you think new stars form in the arms of a spiral galaxy and not in the enter bulge?

well, my opinion would be because of the objects and the planets in our galaxie, the spiral galaxie.


What is the word for a group of stars that form a picture?

A group of stars that form a picture (at least in human eyes) is known as a constellation.


How do spiral galaxies form?

Spiral galaxies form from the collapse of a protogalactic cloud. Spiral galaxies consist of three components: a rotating disk, a bulge and a halo. Spiral galaxies, like the Milky Way, owe their shape to stars inside the protogalaxy developing at different intervals. The gas between forming stars continues to be compressed, and the resulting gravitational differences manhandle the protogalaxy's stars, dust and gas. When the protogalactic cloud collapses, the stars in the bulge and halo form first. These stars have rather random orbits around the galactic center. The galactic center probably contains a supermassive black hole, which likely exerts some gravitational influence on the formation of a spiral galaxy. The remainder of the cloud forms a disk due to the conservation of angular momentum (the same effect as the spinning up of the dancer when she pulls her arms inside). This motion forces everything into a rotating disk, and additional differences in gravity build the spiral arms. Oppositely, when a protogalaxy's stars develop at the same time, you have an elliptical galaxy on your hands. The stars in the disk form later and thus the disk population of stars are younger than those in the bulge and the halo. Further, the stars in the disk rotate around the center of the galaxy in a collective, well defined way unlike the stars in the bulge and halo.


Is a protogalactic cloud with very little angular momentum is more likely to form an elliptical galaxy or a spiral galaxy?

The higher gas density forms stars more efficiently, so all the gas is converted into stars before a disk can form.


What is the name of the group of stars that form patterns?

constellations


What is a group of a billion stars that form picture?

a constellation


What are the group of stars that form patterns in the sky?

Constellations